AppleTV app for toddlers?

My 18-month-old son likes to play with the AppleTV remote. Of course, the results are rather unpredictable as he launches apps, plays random videos, and who knows what else. I figured *someone* would have made an app that would allow him to play with the remote to hearts content, and respond by drawing lines, playing sounds, changing pictures, or whatever, but so far I haven't found such. Does anyone know of such an app?